Enhanced quantum efficiency in flexible AlGaN deep-ultraviolet light-emitting diodes by external strain. (1st November 2022)

• Record Type: Journal Article
• Authors: Wang, Jin; He, Yunjing; Tong, Jiaming; Cai, Qing; Zhi, Ting; Xue, Junjun
• Is Part Of: Journal of optics. Volume 24:Number 11(2022)
• Publication Date: 2022-11-01
• Subjects: DUV LEDs -- QWs -- IQE -- flexible substrate -- tunable emission wavelength; Optics -- Periodicals; 535.05
• DOI: 10.1088/2040-8986/ac953c
• Languages: English
• ISSNs: 2040-8978

Abstract

Abstract: Flexible electronic devices have great application potential in the field of next-generation consumer electronics. In this paper, we have demonstrated that applying external bending on AlGaN-based flexible deep-ultraviolet light-emitting diodes (DUV LEDs) can modulate the electrical characteristics of the quantum-well heterostructures. The internal quantum efficiency of DUV LEDs can be significantly improved by applying external strain on the device in bend-up mode. In addition, the peak emission of the DUV LEDs can be significantly tuned by bending the device into concave or convex curvatures. This desirable feature allows a single device to be applied in different environments and fields by applying external strain.